AirHint found the following cheapest return flights from St. Louis (STL) to Athens (ATH) in October 2025 (see full year).

Return flights

19 Oct - 04 Nov	Delta
20 Oct - 15 Nov	British Airways
21 Oct - 15 Nov	British Airways
22 Oct - 15 Nov	British Airways
15 Oct - 08 Nov	Air Canada
14 Oct - 08 Nov	Air Canada
18 Oct - 08 Nov	Air Canada
19 Oct - 08 Nov	Air Canada
17 Oct - 30 Oct	Air Canada
10 Oct - 24 Oct	Frontier Airlines
10 Oct - 25 Oct	British Airways
16 Oct - 21 Oct	United

Also check the deals for one-way flights from St. Louis to Athens in October.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from St. Louis to Athens in October from $565

Return flights